In some cases, further tests may be required to identify the underlying cause, such as the Schilling test (now rare) or the detection of antibodies against intrinsic factor or gastric parietal cells
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However, the GSH levels of mucosa remained unchanged, indicating a direct disturbing effect of either agent on mucosal integrity, independent of GSH (Table 1)
Histo pathological study demonstrated hyper pigmentation of basal keratinocytes with neither hyperplasia nor atypical melanocytes consistent with diagnosis of melanotic macules of the penis